The four-sentence rewrite, the legal anchors, and the three planner-side redline details.
"Group's attrition liability shall be calculated as the positive difference, if any, between the Attrition Threshold and the Actual Room-Night Pickup." Re-measures the gap against the threshold, not the full block. Single highest-leverage clause.
"In the event of Force Majeure (Spanish Civil Code Art. 1105, French Civil Code Art. 1218, or German BGB §313), no attrition fee shall be payable." Explicit civil-code anchor; explicit stack on top of attrition.
"No attrition shall apply to room-nights the Hotel successfully resells at the Group Rate or higher during the contracted dates." Shifts loss to hotel only when they fail to resell.
"Group may apply unused contracted room-night value as credit toward a future booking at any property in the [Chain] brand within 24 months." Multi-property chains accept this readily.
Push for itemised variable-cost net (8-15% of room rate) for housekeeping, in-room amenities, guest-facing staff. Itemised is materially better than left-to-hotel-discretion.
Hotel must provide final pickup report within 30 days post-event, listing room-nights consumed by name. Without this clause the buyer has no basis to challenge the hotel's number.
Insist on separate sections for room-night attrition and F&B minimum, with separate carve-outs for each. Bundled wording lets hotels apply the higher percentage to whichever measure failed.